Circular (Round) Sight Glass for observing process conditions in boilers, pipelines & pressure vessels. Available in various materials & sizes to meet your exact specs.
| Material | Aluminosilicate Glass, Borosilicate Glass, glass ceramic, Quartz Glass, Soda Lime Glass |
|---|---|
| Standard | DIN7080, DIN8902 |
| Size | Diameter 10-420mm |
| Thickness | Normal 1-30mm, can up to 1-85mm |
| Edge | Grind or Polish |
Diameter: 10-420mm.
Thickness: normal 1-30mm, can up to 1-85mm
Soda-lime glass: widely available, cheap, working temperature up to 150 °C, DIN8902.
Borosilicate glass: particularly suitable for use in aggressive environments (acids, alkalis, water vapor), working temperature up to 350 °C, DIN7080.
Aluminosilicate glass: working temperature up to 660 °C.
Glass Ceramic: working temperature up to 750 °C.
Quartz glass: with a broad spectrum light transmittance (from ultraviolet to infrared), working temperature up to 1100 °C.
| DIN-Sizes | ||
|---|---|---|
| Dimension D x s (mm) | Viewing Diameter d1 (mm) | Nominal Pressure (bar) |
| 63 x 10 | 48 | 16 |
| 80 x 12 | 65 | 16 |
| 94 x 111) | 801) | 6 |
| 100 x 15 | 80 | 16 |
| 113 x 151) | 1001) | 6 |
| 125 x 15 | 100 | 10 |
| 125 x 20 | 100 | 16 |
| 141 x 151) | 1251) | 6 |
| 150 x 20 | 125 | 10 |
| 150 x 25 | 125 | 16 |
| 166 x 151) | 1501) | 6 |
| 175 x 20 | 150 | 10 |
| 175 x 25 | 150 | 16 |
| 200 x 20 | 175 | 8 |
| 200 x 25 | 175 | 10 |
| 200 x 30 | 175 | 16 |
| 250 x 25 | 225 | 8 |
| 250 x 30 | 225 | 10 |
| 1) As supplement to DIN standard for screwed sight glass fittings similar DIN 11851 – no DIN-dimension! |
||
Diameter (D):
up to 150mm: ± 0.5 mm
from 150 to 200mm: ± 0.8 mm
over 200 mm: ± 1.0 mm
Thickness (s)：
from 10 to 20 mm：+ 0.5 – 0.25 mm
over 20 mm: + 0.8 – 0.4 mm
Flatness (e):
D ≤ 100 mm: 0.05 mm
100 mm < D ≤ 150 mm: 0.08 mm
150 mm < D ≤ 200 mm: 0.12 mm
D > 200 mm: 0.15 mm
Parallelity (p):
D ≤ 100 mm: 0.20 mm
100 mm < D ≤ 200 mm: 0.25 mm
D > 200 mm: 0.30 mm
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